You’re not too late to arrange a great winter vacation — and there are deals to be had if you know which destinations are most affordable on which weeks. Thanks to websites that mine their travel data for highs and lows, we have that information.

Kayak offers this holiday travel guidance, based on its extensive airfare and hotel cost data:

Airfares to Las Vegas during the mid-December “dead zone” are as much as 61 percent below peak fares. The lowest-cost day is Dec. 11, but fares are good until just before the start of the Christmas vacation period. Hotel rates are also really good during this period — but watch out for the “resort fee” scam that makes the featured rates look a lot lower than what they really are.

Trivago, the Internet’s largest hotel metasearch site, mined its extensive price database to come up with these winter travel suggestions:

Hotels in some business-oriented cities cut prices substantially over Christmas. Trivago says that rates in Boston, Chicago, New Orleans, New York, San Diego, San Francisco and Washington are as much as 52 percent below rates earlier in the month.

On the other hand, rates in some visitor-oriented cities increase. Trivago cites increases in Ft. Lauderdale, Memphis, Orlando and Savannah in the range of 10 percent to 29 percent, topping out at 36 percent in Cancun and a huge 59 percent in Paris.

If you want to have a festive New Year’s Eve in a big city, pick your city carefully. Rates in Las Vegas soar by 213 percent over previous dates, with New York City up 51 percent and substantial hikes in many others. On the other hand, rates in Houston drop by 19 percent; rates are also lower in Washington and San Jose.

Hotwire reminds us that, on average, working Americans leave an average of 12 days of paid vacation time unused at the end of the year. And Hotwire has plenty of ideas about how you might want to use those vacation days before the end of 2013.

Among major destinations, the 10 where prices for four-star hotels drop the most between Thanksgiving and Christmas range from 11 percent at Orlando, where a four-star hotel is available for $52 a night (but may add the “resort fee” scam) to 47 percent at San Diego, where a four-star downtown hotels goes for $102 per night.

Comparable deals are available in Boston, Cancun, Chicago, Costa Mesa, Houston and Seattle.